Good question. Escrow usually covers the cost of permitting the vehicles, fuel taxes, trailer, and qualcom. Depending on what type of vehicle you are, would determine how much escrow is due. Escrow is usually deducted weekly until the full amount is collected. It is held in a T-bill acount where you would collect quarterly interest. Upon termination of the lease, monies are refunded back to you usually within 45 days, pending all equipment and permits are returned.
Hope that helps,
ABC